Night latch



Sept. 21 1926.

- v A. c. JACKSON NIGHT LATCH Filed April 10. 1924 V IIIIIIII/A Patented Sept. 21, 1 926.

unites are. as

ARTHUR o. zrAoKsoN, on asn11..annnrma, PEit sYnvANrA, sis-stance, BY MESNE As- SIGNMENTS, TO THE YALE & TowNE MANUFACTURING CQMPANY, on STAMFQRD, CONNECTICUT, A CORPGRATION or CONNECTICUT.

NIGHT LATCH.

Application filed April 10, 1924.. Serial No. 705,582.

One object of my invention is to construct a night latch so that the diaphragm closing the bottom of a latch can be secured in position on a door and the casing can be located over the diaphragm and moved longitudi nally into position, said movement securing the casing firmly to the diaphragm, dispensing with attachments that are exposed when the door isin the locked position;

A further object of the invention is to provide the diaphragm with a yielding beveled member under which the lugs that project from the casing can be forced.

V beveled portions 7. These beveled portions 7 can yield to allow the lugs P of the cas- In the accompanying drawings:

, Fig. l is an inverted plan view of a night latch, illustrating my invention and showing the casing of the lock in position prior to being drawn into its ultimate place; I

2 is a view, similar to Fig. 1, showing the casing drawn into its ultimate position; Fig. 3 is an end'view of Fig. l; V

Fig. 4 is a sectional view on the line 4-4, Fig. 1; r r

Fig. 5 is a sectional view of the casing on the same line as Fig. 4-. with the diaphragm omitted; V r

Fig. 6 is aside view of the diaphragm;

Fig. 7 is a sectional View on theline 7 7, Fig. 6; and

Fig. 8 is a perspective; view of the diaphragm.

Referring to the drawings, 1 is the casing of a night latch of the ordinary form, having an opening 2 at one end for the passage of the bolt. The mechanism of the latch has been omitted from the drawings as it forms no part of the present invention. On the inner side of the casing of the lock are ribs 4, which are cast integral with the casing. In these ribs are grooves 3 one of the walls of which form the lugs 4 The diaphragm 5, which closes the bottom of the casing, has a flange 6, at each side, interrupted by slots 8. The flange at one side of each slot is raised and is shaped to form ing to be forced thereunder. V a

When the casing is in the position shown in Fig. 1, the slots in the casing are opposite the beveled portions 7 of the dia: phragm. At one end of the diaphragm are two portions 9, which are bent at right angles to the body of the diaphragm. These portions have threaded openings for the passage of the screws 10, which pass through openings in the end of the casinggFig. 3. On turning the screws, the casing is drawn into position and the lugs 4 are forced under the beveledportions 7 of the diaphragm, firmly holding the casing to the diaphragm.v which is securedto a door.v

This makes a simple and effective fas tening for the casing of a night latch or other type of lock, in which aydiaphragm is used.

In some instances, one or more screws may be located at the back of the lock casing to pull the casing into positionpor the casing maybe forced into position by other suitable means. The construction between the casing and the yielding beveled portions holds the casing in position so that, when the other parts of the lock are assembled, the two parts are held in proper position in respect to each other.

I claim: V

1. The combination in a night latch, of

a diaphragm adapted to be secured in position on a door, said diaphragm having beveled portions; and a casing arranged to be mounted over the diaphragm, said casing having lugs arranged to engage the 3. The combination in a night latch, Oi

a-diaphragm arranged to be secured in fixed position and having beveled portions at each side, said beveled portions being on. a diflerent plane from the body of the dia phragm; a casing arranged to'be mounted over the diaphragm and grooved to receive the beveled portions of the diaphragm; and screws extending through one end of the 1 casing and engaging the diaphragm to force the easing into engagement with the diaflanges at each side, said flanges being re recesses in the flanges of the diaphragm;

and means for moving the casing longitudinally to cause the lugs to engage the beveled portions of the diaphragm.

ARTHUR O. JACKSON; 

